WebSVN – public – Diff – /sportwatcher/trunk/libgarmin/command.c

 garmin_command_supported ( garmin_unit *    garmin,
 			   garmin_command   cmd )
+{
   int ret = 0;
+  if (!garmin)
+     return 0;
   switch ( cmd ) {
   case Cmnd_Abort_Transfer:
   case Cmnd_Turn_Off_Pwr:
     ret = 1;
     break;
   int    r = 1;
   uint16 c = 0;
   uint16 p = 0;
   uint8  b[2];
+  if (!garmin)
+     return 0;
   /* Determine the packet ID based on the link protocol. */
   switch ( garmin->protocol.link ) {
   case link_L001:           p = L001_Pid_Command_Data;                   break;
   case link_L002:           p = L002_Pid_Command_Data;                   break;
 garmin_send_command ( garmin_unit * garmin, garmin_command cmd )
+{
   garmin_packet packet;
   int ret = 0;
+  if (!garmin)
+     return 0;
   if ( garmin_command_supported(garmin,cmd) &&
        garmin_make_command_packet(garmin,cmd,&packet) ) {
     ret = garmin_write(garmin,&packet);
   } else {
     char hv0[256];

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